Malicious PDF — malware analysis report

Static analysis result for SHA-256 17a9e2991ed01016…

MALICIOUS

PDF

43.2 KB Created: 2020-08-15 13:44:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd78b0df3af2ea4463c0ce754864f4ba SHA-1: 0810c22c4166bf9ea813f02ffb89d3e100bc67d7 SHA-256: 17a9e2991ed01016f6a903781bebef2be657d2559a12d4c923b457117c008bbd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, https://ttraff.cc/wb?keyword=tp-link%20m7350%204g%20lte%20mifi%20manual, is identified as a malicious redirector. The document's content, though obfuscated, appears to be a lure related to a TP-Link manual, aiming to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/wb?keyword=tp-link%20m7350%204g%20lte%20mifi%20manual
    • http://files.mariposaband.com/uploads/1/3/1/4/131454106/3615997.pdf
    • http://files.sweetbabiesdayhome.com/uploads/1/3/2/7/132740320/zipud_wenuv_soraminudej.pdf
    • http://wijomod.rmtta.com/uploads/1/3/1/6/131636612/gixusugibifij.pdf
    • http://files.stphilipstheevangelist.org/uploads/1/3/0/7/130776291/jumuwidata.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/4677/2629/files/tadenubevifafixiriwo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5552/1700/files/dizekijetedinaxibejani.pdf
    • https://cdn.shopify.com/s/files/1/0427/5604/7004/files/87405327893.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/gesafow.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30549310566.pdf
    • https://cdn.shopify.com/s/files/1/0436/3426/2169/files/barashada_naxwaha_af_soomaaliga.pdf
    • https://cdn.shopify.com/s/files/1/0433/6458/1525/files/58682395040.pdf
    • https://cdn.shopify.com/s/files/1/0429/5966/7363/files/validity_and_reliability_of_questionnaires_in_research.pdf
    • https://cdn.shopify.com/s/files/1/0448/0958/4802/files/brahms_hungarian_dance_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0436/9580/0475/files/zusosikazexufolazemini.pdf
    • https://cdn.shopify.com/s/files/1/0429/6802/3194/files/57950583035.pdf
    • https://cdn.shopify.com/s/files/1/0430/1111/3123/files/50568871160.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e54.bin
fc45bb215d930cca73038c5383c589dd9385634d1b3183e8cf2e1371f1697e9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E54 5360 bytes
font_01_sfnt_off00007085.bin
8e7711e1f64b1a483d20dd05464a55b012850e2805f12212ffd1c6d364aee9e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7085 9760 bytes
font_02_sfnt_off000091f9.bin
8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91F9 4324 bytes

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